A Stochastic Model for Misbehaving Relays in Cooperative Diversity

—Existing cooperative diversity protocols are designed with the inherent assumption that users exhibit cooperative behavior all the time. However, in a practical cooperative wireless system users may misbehave in malicious or selfish manner. Thus existing cooperative diversity protocols are inherently vulnerable to misbehaving users as they lack a mechanism to detect the presence of such users. In this paper we examine the physical layer consequences of a malicious user which exhibits cooperative behavior in a stochastic manner. We assume that the malicious user exploits the inherent uncertainty of the wireless channel to hide its malicious behavior. We consider a malicious user which exhibits cooperative and malicious behaviors according to firstorder Markov chain. By behaving stochastically the malicious user attempts to mimic the underlying Markov property of Rayleigh fading channels. Based on this model we examine physical layer performance of cooperative Detect-and-Forward (DF...

• Type: Conference
• Year: 2008
• Where: WCNC
• Authors: Sintayehu Dehnie, Nasir D. Memon
• Keywords: Cooperative, Cooperative Diversity, Malicious User, WCNC 2008, Wireless Networks